Batman: Zero Year

As the title. First of all, we should remove any reference to Three Jokers, which is confirmed to have never been canon even after the release of Joker: Year One (Three Jokers refers to The Killing Joke, and The Killing Joke is partially de-canonized by Zero Year, where a completely different Red Hood Gang is shown and a different origin for the Joker, later confirmed in Joker: Year One). We should also add the events of Joker: Year One and all subsequent sagas. The page is not complete and must be constantly updated.

I noticed it has newer origins for Batman and Joker, does it replace their aformentioned comics?

Hello, all. I'm new to DC and want to read some Batman. I'm starting with the New 52, but I'm not sure if I should start with Batman: The Court of Owls, or Batman: Zero Year?